Patents by Inventor Takeshi Matushima

Takeshi Matushima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical information reading apparatus and related information reading method
    Patent number: 7503492
    Abstract: A guide light indicating a rectangular reading portion, smaller than an imaging visual field of an area sensor, is irradiated on a reading objective. A control unit, under the irradiated guide light, causes the area sensor to capture a first image. Then, the control unit detects the position of the guide light based on captured first image data. Then, with no irradiation of the guide light, the control unit causes the area sensor to capture a second image. The control unit then estimates an existing region of a two-dimensional code in the second image. The control unit selects, as a processing objective, only a code that is completely contained in the reading portion and executes the decode processing only for the selected code. When failed in a reading operation, the control unit expands a processing objective region and executes the decode processing again.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: March 17, 2009
    Assignee: Denso Wave Incorporated
    Inventors: Takeshi Matushima, Motoaki Watabe
  • Optical information reading apparatus and related information reading method
    Publication number: 20050051627
    Abstract: A guide light indicating a rectangular reading portion, smaller than an imaging visual field of an area sensor, is irradiated on a reading objective. A control unit, under the irradiated guide light, causes the area sensor to capture a first image. Then, the control unit detects the position of the guide light based on captured first image data. Then, with no irradiation of the guide light, the control unit causes the area sensor to capture a second image. The control unit then estimates an existing region of a two-dimensional code in the second image. The control unit selects, as a processing objective, only a code that is completely contained in the reading portion and executes the decode processing only for the selected code. When failed in a reading operation, the control unit expands a processing objective region and executes the decode processing again.
    Type: Application
    Filed: July 20, 2004
    Publication date: March 10, 2005
    Inventors: Takeshi Matushima, Motoaki Watabe